Publication date: 15th December 2025
In hybrid metal halide perovskites, chiroptical properties can arise from structural symmetry breaking by incorporating a chiral A-site organic cation within the structure. Similarly, we can induce highly efficient remote chirality transfer where chirality is imposed on an otherwise achiral hybrid metal halide semiconductor by a proximal chiral molecule that is not interspersed as part of the structure yet leads to large circular dichroism dissymmetry factors (gCD) of up to 10−2. These two forms of chirality induction will be presented in 2D and quasi 2D/3D compositions. We systematically investigate the layer number (n-value) dependence and emergent trade-offs in chiroptical properties, spin-relaxation times, and carrier mobilities. Furthermore, we show a variety of devices with functionality that benefits from the chirality using the chiral induced spin selectivity effect. These findings establish a structure-property relationship between CISS and structural chirality, providing new design principles for controlling charge-to-spin interconversion and advancing chiral opto-spintronic semiconductors.
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